document.write( "Question 623723: The range of f(x) = 5x2 + 25x − 55 is y > or equal to -345/4.
\n" ); document.write( "
\n" ); document.write( "Determine the values of x in the domain of f for which f(x) = 15. (Enter your answers as a comma-separated list.)\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #392275 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
\n" );
document.write( "Hi,  ·
\n" );
document.write( "f(x)=5x^2 + 25x-55    | parabola opening Upward 5>0 with min at x = -2.5
\n" );
document.write( "f(-2.5) = -345/4   Yes!  y ≥  -86.25
\n" );
document.write( " f(x) = 15 is an horizontal line, domain can be any real number
\n" );
document.write( "
\n" );
document.write( " \n" );
document.write( "

\n" );